net/bnxt: refactor to properly allocate resources for PF/VF

net/bnxt: refactor to properly allocate resources for PF/VF

1) Move the function reset to bnxt_dev_init.
   On the same lines, setup, enable and request interrupt to init path.
   Memory allocation is also being done in the init path.

2) After a function reset, configure the VFs.  Distribute resources
   evenly between all functions (PF and VF) for now. In the future, this
   should be controllable.

3) The bnxt_vf_info and bnxt_pf_info had lot of duplication. Move the
   common items to struct bnxt. And only unique items specific to PF
   remain in the struct bnxt_pf_info.

4) Program the firmware to allow certain commands sent by a VF.
   Disallowing these will prevent clean VF driver cleanup.

5) Since PF/VF need to allocate resources from a pool in the hardware,
   use func_qcaps and func_qcfg to appropriately query the capabilities
   and available resources.

6) If a PF is being initialized and no VFs are allocated, explicitly
   call func_cfg to allocate the resources.

7) Once resources are requested from the firmware, update local copy
   of resource count in struct bnxt only after sending the func_qcfg to
   make sure the allocation request in the firmware went through.

The changes in this patch will be used by the subsequent patches
to allow proper initialization of PF/VF instance.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>